Humic Matter in Soil and the Environment: Principles and Controversies - Chapter 8 pptx

... discussed in detail. Chapter 9 covers the environmental and industrial importance of humic matter. The outstanding role humic matter plays in preser- vation of soil organic matter, mobilization and ... Concepts in the Early Twentieth Century 2.1.3 The Dawn of Modern Concepts 2.2 Distribution of Humic Matter 2.2.1 Humic Matter in Soils 2.2.2 Hu...

Ngày tải lên: 11/08/2014, 12:21

... substances are mostly in the form of Fe- and Al-humates and hlvates. Other groups of soils containing hurnic matter are the ultisols and oxisols, soils generally low in organic matter content due ... during the years, has set the stage for the development of the concepts and types of humic substances followed today. It triggered in the beginning a flurry...

Ngày tải lên: 11/08/2014, 12:21

... the melanoidin pathway or Maillard's reaction. Sugar and amino acid form the starting points, instead of lignin or phenol and quinone, as is the case in the ligno- protein and phenol-protein ... than protein and amino acids in the issue of humic matter formation. For a long time they were regarded as contaminants rather than as precursors of humic matte...

Ngày tải lên: 11/08/2014, 12:21

... Dekker, Inc. All Rights Reserved. Chemical Composition of Humic Matter 131 minimal. Most of the liberated carbon is apparently retained in the soil in the form of humic matter, since both humic and ... HA-Oxisols FA-Andosols Temperate Redons Soils HA-Afisols HA-Aridisols (Solonetz) HA-Histosols (Peat-bogs) HA-Inceptisols HA-Mollisols HA-Spodosols HA-Ultisol...

Ngày tải lên: 11/08/2014, 12:21

... peptides may be linked to the central core of the humic molecule by H-bonding. The con- ventional way to analyze N compounds in soil and humic acid is by using standard hydrolysis and chromatographic ... Aliphatic C- H, CC-H, C-H stretch of methyl groups C - H bending COO- antisymmetrical stretch Salts of COOH C-0 stretch, aromatic C-0, C-0 ester linkage, phen...

Ngày tải lên: 11/08/2014, 12:21

... have the potential for enhancing polymerization of humic matter by linking the individual molecules together into chainlike structures. The metal -humic acid complex remains soluble when the ... fulvic and humic acids. The data in the table indicate that com- paratively the value of log K, increases from Mg-FA -+ Zn-Fa and to Cu-FA chelates, suggesting th...

Ngày tải lên: 11/08/2014, 12:21

... cycle involves an outer cycle representing the overall cycle, and an inner cycle which occurs in the soils. In the inner cycle, the NO ,- is not denitrified, but consumed by plants and soil ... Importance of Humic Matter 273 decomposition process, on the other hand N is being added in the humic structure. These processes cause the C/N ratio of the h...

Ngày tải lên: 11/08/2014, 12:21

... of the epithelial cells lining the gut via domain II of the toxin protein. The bound toxin then causes ion channels to form in the membrane of the gut epithelial cells, by insertion of domain I ... binding to it. Most lectin molecules contain multiple binding sites and thus can cross-link oligo- or polysaccharides. They are also called agglutinins for this reason, since the...

Ngày tải lên: 11/08/2014, 04:20

... cobalt-56, cobalt-60, manganese-54, sodium-22, and tung- sten- 181 near the study site was the waste lagoon. Because the bees were only receiving cobalt-60 and sodium-22 from the lagoon, and because ... con- tained known bioavailable contamination including tritium, cobalt-56, cobalt-60, manganese-54, sodium-22, and tungsten- 181 . The lagoon was the nearest source of wate...

Ngày tải lên: 12/08/2014, 04:22

... 15.6 38. 0 5.6 13.9 33 .8 Note. Unintentional injuries include poisonings (E850 86 9), falls (E 880 88 8), fire (E893 89 9), drowning (E910), and other unin- tentional injuries (E800 80 7, E820 84 8, E870 87 9, ... Guidelines for drinking-water quality (39) are the international reference point for stan- dard-setting and drinking-water safety. To ensure the delivery of safe drinking-...

Ngày tải lên: 12/02/2014, 12:20